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The tuberculosis control program recorded the following midyear population estimates and numbers of tuberculosis cases for Florida and selected counties in 1993. Geographic Population Number of TB TB Proportion per Location Estimate events 100,000 Florida 13,608,600 1,078 Palm Beach 918,200 124 Dade 1,951,100 Lee 357,600 Hillsborough 866,100 Pinellas 865,000 What was the 1993 period prevalence proportion per 100,000 population for TB in Florida, and each county listed in the table (insert in table)? List a reason why the prevalence for the state and each county was calculated per 100,000 population